A multifunctional air volume measuring device

Abstract

The invention discloses a multifunctional air volume measuring device. The device comprises a measuring pipe, wherein a plurality of throttling elements with multi-cambered surface wing type sectionsare arranged in the measuring pipe, the multi-cambered surface wing type throttling elements form a venturi structure, the multi-cambered surface wing type throttling elements adopt closed hollow structures, front edges of the multi-cambered surface wing type throttling elements are fluid-facing ends, and at least two positive pressure taking holes are formed in the front edge of each multi-cambered surface wing type throttling element; at least two negative pressure taking holes are formed in the maximum wing thickness position of each multi-cambered surface wing type throttling element; pressure sensors are sealed and fixed in the positive pressure taking holes and the negative pressure taking holes; fluid pipelines are formed in the multi-cambered surface wing type throttling elements,fluid inlet pipes are arranged at lower ends of the multi-cambered surface wing type throttling elements, and fluid outlet pipes are arranged at upper ends; the multi-cambered surface wing type throttling elements are connected with an electrostatic pressurization device. The device can effectively utilize waste heat in boiler air and prevent blockage of the pressure taking holes by dirt, so thatthe service life of the measuring device is prolonged.

Description

technical field [0001] The invention relates to an air volume measuring device, in particular to a multifunctional air volume measuring device. Background technique [0002] At present, the air intake and secondary air volume of boilers in major power plants are related to boiler efficiency, so more and more attention is paid to the accurate measurement of air volume. The devices commonly used to measure air volume in the past mainly include differential pressure flowmeters such as Venturi tubes. This type of flowmeter adopts a pressure-taking method that compresses the center of the fluid to take pressure, and is only suitable for flow measurement of circular pipes. Since the commonly used Venturi tube differential pressure flowmeter requires the flow state of the measured fluid to be close to a typical, fully developed turbulent state, and an ideal fluid without vortex (that is, straight beam flow), so in the Venturi tube differential pressure flowmeter A fairly long stra...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects in the prior art and provide a multifunctional air volume measuring device, which only requires a short transitional straight pipe section, which completely solves the problem that common flow measuring devices cannot meet the design requirements of the straight pipe section. The problem of affecting the measurement accuracy due to the length requirement, and high accuracy, good repeatability, wide range ratio, and low pressure loss

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